Since I got my Series 3 a year ago, I've noticed several times that it will randomly change channels to QVC (channel 6). I don't even have that channel active in my lineup, and it won't let me change channels or do anything for a good 5 minutes or so. It will interrupt recording (on both tuners) or playback and won't continue the recording after it changes back. My first Series 3 was replaced in December (totally separate issue) and it didn't happen again for a while, but now it is happening almost every day. Does anyone have any idea why it is doing this?